AURTCULAUI\I. 275 



On pine-wood. Common. Varying in colonr from Avhitc and 

 tan-coloured to dingy. One or two Corticia not easily defined 

 occur on oak-branches, etc., resembling this and C. Sambuci. 

 They require further study before proposing them as species. 

 Tlielephora cretacea, P., and T. dryina, P., belong to these in- 

 determinate species, and are both found in this country ; the 

 former on deal in hothouses, the latter on oak-branches. 



18. C. lividum, P.; effused, agglutinate, waxy, soft, smooth, 

 changing colour ; circumference like the rest of the plant ; 

 hymenium naked, even, somewhat viscid, cracked when dry. 



On wood. Not common. Appin, Capt- Carmichuel . 



14. C. ochraceum, Fr. ; eflused, agglutinate, soft, waxy, at 

 length smooth ; circumference white, somewhat radiating, 

 evanescent; hymenium pallid, then ochraccous, pruinosc, at 

 length naked, tuberculated or papillose. 



On pine-wood, etc. Not common. 



15. C. quercinum, P. ; membranaceous, waxy, at first ag- 

 glutinate, indeterminate, then fixed in the centre, with the 

 border free and involute, rigid, smooth and black below ; hy- 

 menium tinged with pink. — Grev. t. 182. 



On oak-branches. Extremely common. 



16. C. cinereum, Fr. ; waxy, at length rigid, confluent, 

 agglutinate, lurid ; hymenium cinereous from a very delicate 

 bloom. 



On dead wood, sticks, etc. Extremely common, and very 

 variable. Frequently very thick on ash-twigs. 



17. C. incarnatum, Fr. ; waxy, at length rigid, confluent, 

 agglutinate ; circumference radiating ; hymenium bright red 

 or orange, sprinkled with a delicate flesh-coloured bloom. 



On timber, rails, etc. Very common. Sometimes without 

 any radiating circumference. Varying much in the depth of 

 the tint. 



